Different Pronunciations - The Readers' Issue 1

Watch the clip and follow the lyrics of this classic
song by Ella Fitzgerald and Louis Armstrong.

"Let's call the whole thing off"

Notice the pronunciation for "potato" and "tomato"

(EI) is the American version and (A) is the British one.
The rest of the differences, like both ways to pronounce the word
"either" are related to cultural or regional varieties other than
country ones.